A white dwarf star is about the size of A) the sun. B) a ...

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A white dwarf star is about the size of
 
  A) the sun.
  B) a highway truck.
  C) the head of a pin.
  D) Earth.
  E) Actually, it doesn't have any size at all.

Question 2

Velma, inside a train moving at 20 m/s, throws a rock in the forward direction at 5 m/s. According to her the rock moves at 5 m/s. According to Mort, standing on Earth outside the train, the rock moves at approximately 25 m/s. Who is correct?
 
  A) The Wizard of Oz.
  B) Velma, because she threw the rock.
  C) Mort, because he is standing on Earth.
  D) Both, relative to their own reference frames.
  E) Neither, because there is no universal best reference frame.

[tandmlomax84]

Answer to Question 1

D

Answer to Question 2

D

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Thank you!

[tandmlomax84]

Always glad to help...